<template>
  <div class="app-container">
    <!--表单-->
    <el-form :inline="true" class="demo-form-inline">
      <el-form-item>
        <el-select v-model="searchObj.type" clearable placeholder="请选择">
          <el-option label="每日订单数统计" value="pay_num"/>
          <el-option label="每日支付金额统计" value="pay_amount"/>
        </el-select>
      </el-form-item>

      <el-form-item>
        <el-date-picker
          v-model="searchObj.begin"
          type="date"
          placeholder="选择开始日期"
          value-format="yyyy-MM-dd"
        />
      </el-form-item>
      <el-form-item>
        <el-date-picker
          v-model="searchObj.end"
          type="date"
          placeholder="选择截止日期"
          value-format="yyyy-MM-dd"
        />
      </el-form-item>
      <el-button
        :disabled="btnDisabled"
        type="primary"
        icon="el-icon-search"
        @click="showChart()"
      >查询</el-button>
    </el-form>

    <div class="chart-container">
      <div id="chart" class="chart" style="height:500px;width:100%"/>
    </div>
  </div>
</template>
<script>
import echarts from "echarts";
import sta from "@/api/sta";

export default {
  data() {
    return {
      searchObj: {
        type: "",
        begin: "",
        end: ""
      },
      btnDisabled: false,
      xData: [],
      yData: []
    };
  },
  created() {},
  methods: {
    showChart() {
      sta.getStaDaily(this.searchObj).then(response => {
        this.xData = response.data.dateList;
        if(this.searchObj.type === "pay_num"){
          this.yData = response.data.payNumList;
        }else{
          this.yData = response.data.payAmountList;
        }
        this.initChart();
      });
    },
    initChart() {
      // 基于准备好的dom，初始化echarts实例
      var myChart = echarts.init(document.getElementById("chart"));

      // 指定图表的配置项和数据
      var option = {
        //x轴是类目轴（离散数据）,必须通过data设置类目数据
        xAxis: {
          type: "category",
          data: this.xData
        },
        //y轴是数据轴（连续数据）
        yAxis: {
          type: "value"
        },
        //系列列表。每个系列通过 type 决定自己的图表类型
        series: [
          {
            //系列中的数据内容数组
            data: this.yData,
            //折线图
            type: "line"
          }
        ],
        //x坐标轴触发提示
        tooltip: {
          trigger: "axis"
        },
        //区域缩放
        dataZoom: [
          {
            show: true,
            height: 30,
            xAxisIndex: [0],
            bottom: 30,
            start: 10,
            end: 80,
            handleIcon:
              "path://M306.1,413c0,2.2-1.8,4-4,4h-59.8c-2.2,0-4-1.8-4-4V200.8c0-2.2,1.8-4,4-4h59.8c2.2,0,4,1.8,4,4V413z",
            handleSize: "110%",
            handleStyle: {
              color: "#d3dee5"
            },
            textStyle: {
              color: "#fff"
            },
            borderColor: "#90979c"
          },
          {
            type: "inside",
            show: true,
            height: 15,
            start: 1,
            end: 35
          }
        ]
      };

      // 使用刚指定的配置项和数据显示图表。
      myChart.setOption(option);
    }
  }
};
</script>
